using System;
using System.Collections.Generic;
using Sirenix.OdinInspector;
using Spine;
using Spine.Unity;
using UnityEngine;
using AnimationState = Spine.AnimationState;
using Random = UnityEngine.Random;

namespace DDD.Players
{
    public class SpineController : MonoBehaviour
    {
        // Variables
        #region Variables
        // Components
        [field: SerializeField]
        public SkeletonAnimation SkeletonAnimation { get; private set; }
        
        [SerializeField]
        private Material _originalMaterial;
        
        [SerializeField]
        private Material _replacementMaterial;
        
        private AnimationState _animationState;
        
        // Variables
        [SerializeField]
        private bool _isSkinSet = true;
        
        [SerializeField, ShowIf("@_isSkinSet && !_isRandomSkin")]
        private string _initialSkinName = "default";

        [SerializeField, ShowIf("@_isSkinSet")]
        private bool _isRandomSkin;
        
        [SerializeField, ShowIf("@_isSkinSet && _isRandomSkin")]
        private bool _isRandomRange;

        [SerializeField, ShowIf("@_isSkinSet && _isRandomSkin && _isRandomRange"), Tooltip("x <= 값 < y")]
        private Vector2 _randomRange;

        [SerializeField, ShowIf("@_isSkinSet && _isRandomSkin && !_isRandomRange")]
        private List<string> _randomStrings;

        private bool _previousEnabled;
        
        #endregion

        // Unity events
        #region Unity events

        private void Awake()
        {
            InitializeComponents();

            if (!_isSkinSet) return;
            
            if (_isRandomSkin)
            {
                if (_isRandomRange)
                {
                    SetRandomSkin();
                }
                else
                {
                    SetRandomStringListSkin();
                }
            }
            else
            {
                SetSkin(_initialSkinName);
            }
        }

        #endregion
        
        // Initialize methods
        #region Initialize methods
        
        [Button("셋팅 초기화")]
        public virtual void InitializeComponents()
        {
            SkeletonAnimation = transform.GetComponentInChildren<SkeletonAnimation>();
            if (!_originalMaterial)
            {
                _originalMaterial = SkeletonAnimation.SkeletonDataAsset.atlasAssets[0].PrimaryMaterial;
            }
            
            _animationState = SkeletonAnimation.AnimationState;
        }
        
        #endregion

        // Methods
        #region Methods
        
        /// <param name="animationName">스파인 애니메이션 이름</param>
        /// <param name="isLoopActive">반복 여부</param>
        /// <param name="speed">애니메이션 속도 양수값</param>
        /// <param name="isReverse">true인 경우 자동으로 speed에 음수값을 넣음</param>
        /// <returns></returns>
        public TrackEntry PlayAnimation(string animationName, bool isLoopActive, float speed = 1f, bool isReverse = false, int trackIndex = 0)
        {
            if (!SkeletonAnimation || _animationState == null) return null;

            if (string.IsNullOrEmpty(animationName))
            {
                Debug.LogError($"{animationName}의 애니메이션은 존재하지 않습니다.");
                return null;
            }
            
            // 중복 체크
            var currentTrackEntry = _animationState.GetCurrent(trackIndex);
            if (currentTrackEntry != null && currentTrackEntry.Animation.Name == animationName)
            {
                return currentTrackEntry;
            }
            
            _animationState.TimeScale = isReverse ? -Mathf.Abs(speed) : Mathf.Abs(speed);
            var trackEntry = _animationState.SetAnimation(trackIndex, animationName, isLoopActive);
        
            if (isReverse)
            {
                trackEntry.TrackTime = trackEntry.AnimationEnd;
            }

            return trackEntry;
        }

        public TrackEntry PlayAnimationDuration(string animationName, bool isLoopActive, float duration, bool isReverse = false, int trackIndex = 0)
        {
            if (!SkeletonAnimation || _animationState == null) return null;

            if (string.IsNullOrEmpty(animationName))
            {
                Debug.LogError($"{animationName}의 애니메이션은 존재하지 않습니다.");
                return null;
            }
            
            // 중복 체크
            var currentTrackEntry = _animationState.GetCurrent(trackIndex);
            if (currentTrackEntry != null && currentTrackEntry.Animation.Name == animationName)
            {
                return currentTrackEntry;
            }
            
            var findAnimation = SkeletonAnimation.Skeleton.Data.FindAnimation(animationName);
            if (findAnimation == null)
            {
                Debug.LogError($"{animationName} 애니메이션을 찾을 수 없습니다.");
                return null;
            }

            var speed = findAnimation.Duration / duration;
            _animationState.TimeScale = isReverse ? -Mathf.Abs(speed) : Mathf.Abs(speed);
            var trackEntry = _animationState.SetAnimation(trackIndex, animationName, isLoopActive);
        
            if (isReverse)
            {
                trackEntry.TrackTime = trackEntry.AnimationEnd;
            }

            return trackEntry;
        }
        
        public TrackEntry AddAnimation(string animationName, bool isLoopActive, int trackIndex = 0)
        {
            if (!SkeletonAnimation || _animationState == null) return null;

            if (string.IsNullOrEmpty(animationName))
            {
                Debug.LogError($"{animationName} 애니메이션은 존재하지 않습니다.");
                return null;
            }
            
            var trackEntry = _animationState.AddAnimation(trackIndex, animationName, isLoopActive, 0);

            return trackEntry;
        }

        public string GetCurrentSkin()
        {
            if (SkeletonAnimation == null) return null;

            return SkeletonAnimation.Skeleton.Skin.ToString();
        }

        public void SetSkin(string skinName)
        {
            if (SkeletonAnimation == null && _animationState == null) return;
            
            if (string.IsNullOrEmpty(skinName))
            {
                Debug.LogError($"{skinName}의 스킨 이름은 존재하지 않습니다.");
                return;
            }
            
            SkeletonAnimation.Skeleton.SetSkin(skinName);
            SkeletonAnimation.Skeleton.SetSlotsToSetupPose();
            _animationState.Apply(SkeletonAnimation.Skeleton);
        }

        public void SetRandomSkin()
        {
            if (SkeletonAnimation == null || SkeletonAnimation.Skeleton == null) return;
            
            var skins = SkeletonAnimation.skeleton.Data.Skins;
            var randomSkin = Random.Range((int)_randomRange.x, (int)_randomRange.y);
            var randomSkinName = skins.Items[randomSkin].Name;
            SetSkin(randomSkinName);
        }
        
        public void SetRandomStringListSkin()
        {
            if (SkeletonAnimation == null || SkeletonAnimation.Skeleton == null) return;

            if (_randomStrings == null || _randomStrings.Count <= 0)
            {
                Debug.LogError("_randomStrings 설정 오류");
                return;
            }
            
            var randomSkin = Random.Range(0, _randomStrings.Count);
            var randomSkinName = _randomStrings[randomSkin];
            SetSkin(randomSkinName);
        }

        public void EnableCustomMaterial()
        {
            if (_previousEnabled) return;
            
            SkeletonAnimation.CustomMaterialOverride[_originalMaterial] = _replacementMaterial;
            _previousEnabled = true;
        }
        
        public void DisableCustomMaterial()
        {
            if (!_previousEnabled) return;
            
            SkeletonAnimation.CustomMaterialOverride.Remove(_originalMaterial);
            _previousEnabled = false;
        }
        
        public bool IsAnimationComplete(int trackIndex = 0)
        {
            if (!SkeletonAnimation || _animationState == null) return false;

            var currentTrackEntry = _animationState.GetCurrent(trackIndex);
            if (currentTrackEntry == null) 
            {
                Debug.LogWarning($"트랙 {trackIndex}에서 재생 중인 애니메이션이 없습니다.");
                return false;
            }

            return currentTrackEntry.IsComplete;
        }
        
        #endregion
    }
}